short_filters_kernel.h

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/* -*- mode: C; indent-tabs-mode: nil; c-basic-offset: 8; tab-width: 8; -*- */
/* vim: set shiftwidth=8 softtabstop=8 expandtab: */
/*
 ********************************************************************
 ** NIDAS: NCAR In-situ Data Acquistion Software
 **
 ** 2007, Copyright University Corporation for Atmospheric Research
 **
 ** This program is free software; you can redistribute it and/or modify
 ** it under the terms of the GNU General Public License as published by
 ** the Free Software Foundation; either version 2 of the License, or
 ** (at your option) any later version.
 **
 ** This program is distributed in the hope that it will be useful,
 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 ** GNU General Public License for more details.
 **
 ** The LICENSE.txt file accompanying this software contains
 ** a copy of the GNU General Public License. If it is not found,
 ** write to the Free Software Foundation, Inc.,
 ** 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 **
 ********************************************************************
*/
/*
                                          
  Simple filters for use in 16 bit digital sampling.

*/

#ifndef NIDAS_SHORT_FILTERS_KERNEL_H
#define NIDAS_SHORT_FILTERS_KERNEL_H

#include <nidas/linux/short_filters.h>

#include <nidas/linux/types.h>

#ifdef __KERNEL__

typedef struct short_sample
{
        dsm_sample_time_t timetag;

        dsm_sample_length_t length;

        short id;

        short data[0];

} short_sample_t;

struct short_filter_data {
        const char* deviceName;

        int nchans;

        int* channels;

        int inputRate;

        int outputRate;

        void* filterObj;

        short sampleIndex;
};

typedef void* (*shortfilt_init_method)(void);

typedef int (*shortfilt_config_method)(struct short_filter_data* fdata,
    const void* cfg,int nbcfg);

typedef int (*shortfilt_filter_method)(void* obj,
    dsm_sample_time_t tt, const short* in, int skip_factor, short_sample_t* out);

typedef void (*shortfilt_cleanup_method)(void* obj);

extern struct short_filter_methods get_short_filter_methods(enum nidas_short_filter type);

struct pickoff_filter_config
{
};

struct boxcar_filter_config
{
        int npts;
};

struct timeavg_filter_config
{
        int rate;
};

struct short_filter_methods {
        shortfilt_init_method init;
        shortfilt_config_method config;
        shortfilt_filter_method filter;
        shortfilt_cleanup_method cleanup;
};


struct short_filter_info {
        shortfilt_init_method finit;
        shortfilt_config_method fconfig;
        shortfilt_filter_method filter;
        shortfilt_cleanup_method fcleanup;
        struct short_filter_data data;
};

#endif  /* __KERNEL__ */

#endif